| Standard label: | SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member] |
| Name: | us-gaap:AllowanceForLossesOnFinanceReceivablesMember |
| Documentation: | Allowance for portion expected to be uncollectible of investment in contractual right to receive money on demand or on fixed or determinable date recognized as asset in creditor's statement of financial position. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AllowanceForLossesOnFinanceReceivablesMember |
| Label | Role | Language |
| SEC Schedule, 12-09, Allowance, Loss on Finance Receivable [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 S99 4 (SX 210.12-09(ColumnA)) | http://www.xbrl.org/2009/role/commonPracticeRef | 235 |